not working

[Blackbeard25]

when i try to control my lcd's with the i2c protocol i only get the first letter of each line i send to the screen. i am using a pcf8574at on a backpack

[lucasmaziero]

Is using Arduino or ESP??

[12458]

I am also experiencing this issue with an Arduino Uno R3 using a PCF8574A with a 20x4 LCD at address 0x3F.

[12458]

Using the original library I am able to get the LCD working.

[philippedc]

hi, it is very well working on ESP8266, Lolin D1 mini and mini pro.
BUT on Arduino Uno I only have the first letter.
LCD is the classic LCD1602.

[fscii]

hi, it is very well working on ESP8266, Lolin D1 mini and mini pro.
BUT on Arduino Uno I only have the first letter.
LCD is the classic LCD1602.

This is the same issue I have. I can use fine on ESP8266 12-F NodeMCU 1.0. When I try to use on Arduino UNO, all that prints is the first character of each line.

8266 Example

ESP8266
Hello World

Uno

A
H

Is there any chance you can fix this or tell me how? I keep finding LCD 12C libraries that work on arduino but not ESP, I don't want two libraries and am VERY humbly asking can you please help with this?

[wwlee-sg]

Vs-code keeps reporting this Werror below today, something must have changed as the same code was compiled successfully a day before. No change was made since.
Hope you can help.
Thank you

Compiling .pio\build\esp12e\libb07\LiquidCrystal_I2C\LiquidCrystal_I2C.cpp.o
lib\LiquidCrystal_I2C\LiquidCrystal_I2C.cpp: In member function 'virtual size_t LiquidCrystal_I2C::write(uint8_t)':
lib\LiquidCrystal_I2C\LiquidCrystal_I2C.cpp:244:1: error: no return statement in function returning non-void [-Werror=return-type]
244 | }
| ^
cc1plus.exe: some warnings being treated as errors
*** [.pio\build\esp12e\libb07\LiquidCrystal_I2C\LiquidCrystal_I2C.cpp.o] Error 1